Preparation and particle size effects of Ag/α-Al2O3 catalysts for ethylene epoxidation
نویسندگان
چکیده
منابع مشابه
Ag-Cu catalysts for ethylene epoxidation: selectivity and activity descriptors.
Ag-Cu alloy catalysts for ethylene epoxidation have been shown to yield higher selectivity towards ethylene oxide compared to pure Ag, the unique catalyst employed in the industrial process. Previous studies showed that under oxidizing conditions Cu forms oxide layers on top of Ag. Using first-principles atomistic simulations based on density functional theory, we investigate the reaction mecha...
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The oxidation of copper catalysts during ethylene epoxidation was characterized using in situ photoemission spectroscopy and electron microscopy. Gas chromatography, proton-transfer reaction mass spectrometry and electron-ionization mass spectrometry were used to characterize the catalytic properties of the oxidized copper. We find that copper corrodes during epoxidation in a 1 : 1 mixture of o...
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کاتالیزورهای co-fe-resol/sio2و fe-mn-resol/sio2 با استفاده از روش ساده و ارزان قیمت همرسوبی تهیه شدند. از رزین پلیمری resol در فرآیند تهیه کاتالیزور استفاده شد.
Intelligent catalysts for ethylene oligomerization and polymerization
EEthylene polymerization catalysts became available in an enormous variety. The challenge in this research is to find catalysts that are able to connect ethylene molecules in such a way that not only linear chains are produced but variations like branched materials that possess very interesting mechanical properties like linear low density polyethylene (LLDPE). In this contribution, three diffe...
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The low selectivity of heterogeneous catalysts has been one of the critical obstacles to the wider use of heterogeneous processes in the commercial production of high value chemicals. The limited selectivity is related to a number of issues, including the lack of predictive theories that guide the discovery of the optimal catalytic site, the dearth of strategies to synthesize the targeted sites...
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ژورنال
عنوان ژورنال: Journal of Catalysis
سال: 2017
ISSN: 0021-9517
DOI: 10.1016/j.jcat.2017.10.001